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http://hdl.handle.net/2080/41
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DC Field | Value | Language |
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dc.contributor.author | Behera, S K | - |
dc.contributor.author | Barpanda, P | - |
dc.contributor.author | Pratihar, S K | - |
dc.contributor.author | Bhattacharyya, S | - |
dc.date.accessioned | 2005-05-20T07:42:12Z | - |
dc.date.available | 2005-05-20T07:42:12Z | - |
dc.date.issued | 2004-03 | - |
dc.identifier.citation | Materials Letters, Vol 58, Iss 9, P 1451-1455 | en |
dc.identifier.uri | http://hdl.handle.net/2080/41 | - |
dc.description | Copyright of this article belongs to Elsevier Science Ltd | en |
dc.description.abstract | Magnesium–aluminium spinel has been synthesized by citrate–nitrate route using hydrated nitrates of Mg and Al as the precursors with a citrate–nitrate ratio of 1:1. Self-ignition of the gel-like mass yielded a black mass, which crystallized to Mag–Al spinel on calcination at 650 °C for 9 h. The crystallized mass was a mixture of ordered and disordered phases of Mag–Al spinel. Phase pure-ordered spinel could be obtained for powders calcined at 1100 °C and above. The green compacts of the spinel powders could be sintered to near theoretical density at 1150 °C for 30 min. The activation energy for densification was calculated (16.4 kcal/mol) assuming Arrhenius type behaviour. The densification mechanism could be assigned to the ordering of the disordered spinel involving vacancy diffusion through the surface. | en |
dc.format.extent | 215747 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | Elsevier | en |
dc.subject | Autoignition | en |
dc.subject | Citrate–nitrate gel | en |
dc.subject | Black ash | en |
dc.subject | Order–disorder Mag–Al spinel | en |
dc.title | Synthesis of magnesium–aluminium spinel from autoignition of citrate–nitrate gel | en |
dc.type | Article | en |
Appears in Collections: | Journal Articles |
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bhatta3.pdf | 210.69 kB | Adobe PDF | View/Open |
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